Scalping and grading device



(No Model.)

A. HUNTER. SGALPING- AND GRADING DEVICE. No. 420,803. Patented Feb. 4, 18.90I

NrTED STATES ATENT OFFICE.

ANDREW HUNTER, OF MILWAUKEE, VISCON SIN.

SCALPING AND GRADING DEVICE.

SPECIFICATION formingpart of Letters Patent No. 420,803, dated February '4, 1890.

Application filed January 9,1889. Serial No. 295,868. (No model.)

To all whom it may concern.-

Be it known that I, ANDREW HUNTER, of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new and useful Improvements in Scalping and Grading Devices; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to scalping and grading devices for the treatment of' breaks and other products resulting from the manufacture of grain into flour, and will be fully set forth hereinafter, and pointed Aout in the claims.

In the drawings, Figure l is a vertical longitudinal section through my improved machineLtaken near one side thereof. Fig. 2 is a partial side elevation. Fig. 3 is a section on the line 3 3 of Fig. l, and Fig. 4 is a detail section on the line 4 4 of Fig-1.

A A represent the side walls of my machine, B the tail end, and C the head end, A2 representing one of the inclined cantboards projecting inwardly from the lower portions of the side walls A and A', forming, with the other interior cant-boards D D', arranged at right angles to the cantfboards Aia four-sided hopper having a dischargeopening at a, the board D' extending up to the head wall C, while the board D extends up only about as high as the partition B', which forms one wall of the spout B2 between said partition and the tail wall B, said spout having its discharge-opening at h.

E E' represent the top of the machine, the portion E' being hinged, as shown, to afford a convenient means of access to the interior.

F F designate stationary guides secured at an angle to the interior of the side walls A A', and Gr G represent adjustable guides above the guides F F, held to the said side Walls by bolts c c, passing through slots c e in the said side walls, and tightened to place by thumb-nuts d d.

H is a screen, to the top of the side walls of which are secured (at about the center) stirrups I, united by a transverse piece f, to each end of which is secured one end of a spring-strip J, (of wood or metah) the other ends of said spring strips being secured to the side walls A A of the machine. Each end of the screen is provided with cross= strips g g on the under side, beneath which are bracketsor rests K K, having their upper edges covered with pieces of rubber, leather, or other suitable material h h, similar pieces h' 7L' being applied to the upper surface of the side walls of the screen-frame, near'each end, as shown, and above these last-named pieces the side walls A and A are perforated for the admission of the Shanks or journals z' of the eccentric-stops L, which latter are covered with rubber or analogous material z", the ends of said j ournalsbeing screw-threaded, and after the stops have been adjusted to the desired position (so as to leave less or more space between them and the screen below, as required) the said stops are clamped tightly against the side walls A and A by means of the th umh-nuts t?, as shown in detail in Fig. 4. Above each of the spring-strips J there is another of these 'adj ustable eccentric-stops L, similarly secured to place.

M M' represent two rods extending through the machine from side to side, carrying near each end, inside the machine, sprocket-wheels 7' j, while the outer projecting ends of said rods are suitably j ournaled in boxes k k, and around these sprocket-wheels at each side of the machine there pass the sprocket-chains m, which are united by the transverse brush or scraper N, whose ends travel around the guides Gand between the same and the guides F, scraping or brushing the lower surface of the screen H, all as clearly shown in Figs. l and 3. In order to prevent the brush from tipping backward, I preferably secure to each end thereof an angle-plate n, whose horizon` tal arm slides along the guide G at each side of the machine.

O is a shaft extending through suitable openings in the side walls of the machine and journaled in vertically-adjustable boxes P, which boxes are slotted, as shown at o, to receive bolts p, passing through holes in the side walls A A', and having set-nuts,the said boxes having upper anges p', through which pass bolts P', which pass up through the upper timbers A3 of the machine-frame, and are there secured by nuts for aiding in the adj ustment and support of the boxes P. This shaft O is provided inside the machine near each endJvith the cams Q Q, which bear against the under side of the transverse IOO piece f, which is re-enforced at such points b y strips q q, of leather, rubber, or other suitable material.

R is the hopper, having a hexagonal or other polygonal-faced feed-roller S in the lower part thereof mounted on a shaft R,which projects through the said hopper, one end of said shaft carrying a sprocket-wheel fr, from which a sprocket-chain fr extends to a similar sprocket-wheel '7"e on the outer projecting portion of the rod M below. The hopper has the usual bottom openin g above the screen, and is furnished with a stationary guard or cant-board s, to prevent the material falling down on the wrong side of the feed-roller, and with a pivoted feed-board T, hung by hooks t to loops or eyes t', depending from the top ot' the hopper just in front of a transverse guard-strip 152, and the lower portion of this feed-board T is kept normally against the feed-roller S, but permitted to yield, so as to allow the material to pass between it and said feed-roller, by means of a spring u, mounted, preferably, on a guide-pin U, which passes through a hole in said feed-board, the guide-pin having a head, which, with the adjacent end of the spring n, is received in a cup a', fitted in the front board of the hopper, this cup having a screw-threaded bore to receive an adjustingscrew u2, the end of which presses against the said head of the said guide-pin, thus forcing the spring forward and compressing it, the other end of said spring bearing against the feed-beard T, as shown. The 4feed-hopper R and the feed-board T extend the entire width of the machine, and I preferably employ a guide-pin U, with spring u and adjusting-screw 'a2 near each end of the same.

The described shaft 0 (which is the powershaft) is provided with a pulley O at the end opposite to the end X, which carries the pulley (not shown) by which it is driven, and this pulley O is connected by belt c with a large pulley V on the extreme end ot' the rod M', (beyond the sprocket-wheel rfi) which pulley V is about tive times (more or less) the diameter of the pulley O', while the sprocketwheels j, vrr2, and I7' are of the same size, so that in the operation of the machine the powershaft O will move very rapidly, causing an incessant agitation ot' the screen by reason of the impactof the cams Q Q against the transverse piece f, secured, as described, to said screen, while by reason of the large pulley V the motion of the feed-roller S and the brush N is correspondingly much slower. The object of havi-ng the boxes P adjustable, as described, is to give more or less throw to the screen.

lly the use of my centrally-arran ged single shaft O and stops L L, l guard against the screen being accidentally raised higher at one end than at the other by the action of the cams on the shaft, while if I desire to have a greater rise at the head of the screen I have only to turn the adjacent eccentric-stops L, so that there will, be more space between them and the screen t-han at the lower end, and set the stops, and this result iswaccomplished.

In order to tightly stretch the wire-cloth or other material of which the bottom of my screen is composed and prevent sagging, I employ rods IV, extending across the screen from side to side, one end of cach rod being screw-threaded and provided with a thumbnut Y, as shown. Y The advantage of my polygonal-faced feedroller lies in the fact that the extending points thereof serve to draw in the material being fed better than a smooth feed-roller or one having corrugations or depressions, and by reason of my described automatically-adjusting feed-board the material falls in an even sheet the entire width of the machine, whether there is alight or heavy feed of said material, the springs compressing or expanding according as the pressure against the feed-board is increased or diminished, thereby producing an even flow the whole width of the screen.

I-Iaving thus fully described myinvention, what I claim as new, and desire to secure by Letters Patent, is f l. In a scalping and grading device, the combination of a suitable frame, an inclined screen, brackets secured to said frame for supporting the screen-frame, stirrups rising from the side walls of the screen-frame at or near the center thereof and connected by a transverse piece, elastic supports secured to the side walls of the machine-frame and to the screen-frame, and a shaft located above the screen and beneath and in line with said transverse piece and carrying cams for engagement with. `the under side of the latter, substantially as set forth.

2. In a sealping and grading device, the combination of a suitable frame, aninelined screen, brackets secured to said frame for supporting the screen-frame, stirrups rising' from the side walls of the screen-frame at or near the center thereof and connected by a transverse piece, sprin g-strips secured at their rear ends to the side walls of the machineframe and. at their front ends secured to said transverse piece, and a shaft located above the screen and beneath and in line with said transverse piece, and carrying cams for engagement with the under side of the latter, substantially as set forth.

3. In a scalping and grading device, the combination cfa suitable frame, an inclined screen, brackets secured to said frame for supporting the screen-frame, stirrups rising from the side walls of the screen-frame at or near the center thereof and connected by a transverse piece, a shaft located above the screen and beneath and in line with said4 transverse piece and carrying cams for engagement with the under side of the latter, and adjustable stops located above the side walls of the screen-frame near each end thereof for regulating the height to which ICO IIC

each end can rise, substantially as set forth. p

Lt. In a scalping and grading device, the

combination of a suitable frame, an inclined screen, brackets secured to said frame for supporting the screen-frame, stirrups rising from the side Walls of the screen-frame at or near the 'center thereof and connected by a transverse piece, vertically-adjustable boxes secured to the side Walls 'of the machineframe, and a shaft journaled in said boxes and extending through the machine above the screen and beneath and in line with said transverse piece, and providedwith cams for engagement with the latter, substantially as set forth.

5. In a scalping and grading device, the combination of a suitable frame, an inclined screen, brackets secured to said frame for supporting the screen-frame, stirrups rising' from the side walls of the screen-frame at or near the center thereof and connected by a transverse piece, spring strips secured at their rear ends to the side Walls of the inachine-frame and at their front ends secured to said transverse piece, a shaft located above the screen and beneath and in line with said transverse piece and carrying cams for engagement with the under side of the latter, and adjustable stops located above the side Walls of the screen frame near each end thereof, substantially as set forth.

6. In a scalping and grading device, the combination of a suitable frame, an inclined screen, brackets secured to said frame for supporting the screen-frame, stirrups rising from the side Walls of the screen-frame at or near the center thereof and connected by a transverse piece7 spring-strips secured at their rear ends to the side Walls of the inachine-frame and at their front ends secured to said transverse piece, a shaft located above the screen and beneath and in line with said transverse piece and carrying cams for engagement With the under side o'f the latter, adjustable stops located above the side Walls of the screen-frame near each end thereof, and other adjustable stops located above the said spring-strips, substantially as set forth.

7. In a scalping and grading device, the combination, with an inclined screen, of a shaft transversely arranged practically in line Wit-h the center of the screen-frame and carrying cams for agitating said screen, and adjustable stops located above the side walls of the screen-frame near each end thereof for regulating the height to which each end can rise, substantially as set forth.

8. In a scalping and grading device, the combination, With a frame the side Walls of which are provided with vertical slots, of vertically-adjustable boxes secured to the said side walls adjacent to said slots, an inclined screen, and a shaft journaled in said boxes and passing through said slots, said shaft being transversely arranged practically in line with the center of the screen-frame and carrying cams for agitatin g said screen, substantially as set forth.

9. In a scalping and grading device, the combination, with a suitable frame, of an inclined screen, adjustable inclined guides secured to the side Walls of said frame beneath said screen, stationary inclined guides secured to said Walls beneath said adjustable guides, rods extending from one side Wall to the other at each end of the adjustable guides, said rods carrying sprocket-Wheels near each end, sprocket-chains connecting the sprocket- Wheels of the said rods at each side of thev machine, and a transverse brush connecting said sprocket-chains, the ends of said brush being adapted to travel around the adj ustable guides and between the same and the stationary guides, and beingprovided with angle-plates to guard against tipping backward in their travel, substantially as set forth.

l0. In a scalping and grading device, the combination of a feed-hopper, With a feedroller located in the lower portion thereof, and an automatically-adj ustable feed-board extending the entire Width of the said hopper and linked to the upper part thereof and normallybearing against the said feed-roller, a cup fitted in the front board of the hopper, a spring-surrounded guide-pin having a head Within said cup and a point passing through a hole in said feed-board, and an adjustingscrew passing through a screw-threaded bore in the outer end of said cup and bearing against the head of said pin, substantially as set forth.

In testimony that l claim the foregoing I have hereunto set my hand, at Minneapolis, in the county of Hennepin and State of Minnesota, in the. presence of two Witnesses.

J. L. PARKER, FRED ANDREWs.

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